package collection;

import java.util.ArrayList;
import java.util.List;

public class ListDemo3 {
    public static void main(String[] args) {
        List<Integer> list = new ArrayList<>();
        for (int i = 0; i < 10; i++) {
            list.add(i);
        }
        System.out.println(list);
        /*
            List subList(int start,int end)
            获取指定下标范围内的子集。范围含头不含尾
         */
        //获取3-7
        List<Integer> subList = list.subList(3, 8);
        System.out.println(subList);

        //将子集每个元素扩大10倍
        for (int i = 0; i < subList.size(); i++) {
//            int d = subList.get(i);
//            d = d * 10;
//            subList.set(i,d);

            subList.set(i, subList.get(i) * 10);
        }
        System.out.println(subList);//[30,40,50,60,70]
        //对子集的操作就是对原集合对应的操作
        System.out.println(list);

        //删除list集合中的2-8
        list.subList(2, 9).clear();
        System.out.println();//[0,1,9]

    }
}
